MIDI photometry的稳定性：Circinus的情况
Stability of the MIDI photometry: the case of Circinus
摘要：
原则上，甚大望远镜阵列（VLTI）上的中红外干涉仪（MID-infrared Interferometric instrument）应始终测量特定源的相同校准总通量光谱，而与仪器设置和基线几何形状无关。然而，在圆规星系的数据中，有（a）2009年的通量值普遍偏移，（b）两个夜晚（2008-04-17和2009-04-14）短波长的总通量缓慢漂移。后者似乎取决于观察的小时角度。在本文件中，对这两种影响进行了更详细的分析和总结。我们的目标是找到一个解释这些变化的光度。
英文摘要：
In principle, the MID-infrared Interferometric instrument (MIDI) at the Very Large Telescope Array (VLTI) should always measure the same calibrated total flux spectrum for a specific source, independent of the instrument settings and the baseline geometry. In the data on the Circinus galaxy, however, there is (a) a general offset of the flux values for 2009 and (b) a slow drift of the total fluxes at short wavelengths during two nights (2008-04-17 and 2009-04-14). The latter seems to depend on the hour angle of the observation. In this document, a more detailed analysis of these two effects is carried out and summarised. The goal is to find an explanation for these variations in the photometry.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
